Combined Effects of Reduced pH and Elevated Temperature on Growth of Marine Gastropod, Nerita textilis
Subject Areas : Journal of Animal Biology
Musa Keshavarz
1
,
Abdul Ali Hamzei
2
,
Emad Koochaknejad
3
*
1 - Department of Marine Biology, Faculty of Marine Sciences and Technologies, University of Hormozgan, Bandar Abbas, Iran
2 - Department of Marine Biology, Faculty of Marine Sciences and Technologies, University of Hormozgan, Bandar Abbas, Iran
3 - Iranian National Institute for Oceanography and Atmospheric Science, Tehran, Iran
Keywords: Climate change, Ocean acidification, Global warming, Nerita textilis,
Abstract :
The warming of ocean waters due to global climate change and the concurrent acidification of oceans resulting from increased carbon dioxide levels represent inevitable challenges for aquatic organisms. These changes are likely to have profound consequences for marine ecosystems. In this study, we investigated the combined effects of water acidification and temperature increase on the growth of intertidal gastropod oysters (Nerita textilis) in the context of predicted climate conditions in the Persian Gulf. We collected 48 samples of N. textilis from Mangrove forests near Bandar Abbas. These samples were of nearly identical size and weight. After collection, the gastropods were transferred to laboratory tanks, each with a volume of 100 liters. Four distinct experimental conditions were established: Tank 1: Ambient temperature (30°C) and pH (8.2), Tank 2: Ambient temperature (30°C) and lower pH (7.8), Tank 3: High temperature (34°C) and ambient pH, Tank 4: High temperature (34°C) and low pH. During a 90-day test, we monitored the growth parameters of the gastropods. Our findings revealed even at ambient temperature, low pH conditions led to a reduction in the density of N. textilis shells. The height of N. textilis shells was significantly influenced by temperature, particularly at the end of the experiment. Over the test period, gastropods in three tanks experienced significant weight loss due to the effects of increased temperature and lower pH. In summary, our results highlight the vulnerability of N. textilis to the upcoming climate changes in the Persian Gulf. These findings underscore the need for continued research and conservation efforts to mitigate the potential impacts on marine organisms in this ecologically sensitive region.
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